CN106899838A - A kind of focusing method and system - Google Patents
A kind of focusing method and system Download PDFInfo
- Publication number
- CN106899838A CN106899838A CN201710115965.9A CN201710115965A CN106899838A CN 106899838 A CN106899838 A CN 106899838A CN 201710115965 A CN201710115965 A CN 201710115965A CN 106899838 A CN106899838 A CN 106899838A
- Authority
- CN
- China
- Prior art keywords
- focusing
- projector equipment
- definition
- focal length
- projected picture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
A kind of focusing method and system that the present invention is provided, are related to technical field of focusing.Method includes：Projector equipment controls drive device to preset step-length according to first and carries out focus operations successively, carries out projection process to the mark picture for prestoring under each focal length, generates projected picture；Terminal device is obtained when the corresponding projected picture of front focal length before drive device carries out focus operations next time, calculates the definition of the projected picture；In the definition of the definition projected picture corresponding less than adjacent preceding n times focal length of the projected picture obtained when front focal length, generation stops focusing instruction to terminal device；Projector equipment stops focus operations according to focusing instruction control drive device is stopped.By the above method, can solve the problems, such as in the prior art because projector equipment is not provided with image acquiring device cannot accurate focusing automatically so that solve the problems, such as because need it is special image acquiring device is set there is complex structure, be more expensive to manufacture.
Description
Technical field
The present invention relates to technical field of focusing, in particular to a kind of focusing method and system.
Background technology
Range of application with projector equipment constantly expands, progressively expanded to from commercial office field education and study and
Family life field.With being continuously increased for application field, user also increasingly payes attention to the drop shadow effect of projector equipment, especially
It is that the definition of image quality directly affects the experience of user.The focal length when definition of image quality is typically projected with projector equipment
Correlation, therefore when projection operation is carried out using projector equipment, focus operation can be carried out, the projection high to obtain image quality definition
Picture.
In the prior art, typically there are two kinds of focusing methods, including manual focusing and automatic focusing.Manual focusing it is main according to
The image quality of projected picture projected picture is judged by human eye, so as to complete focus operation.Automatic focusing is to rely on and project
The image acquiring device of equipment association is judged the image quality of projected picture, so as to complete focus operation.
Studied through inventor and found, manual focusing method of the prior art is sentenced because carrying out the definition of image quality by human eye
Break and there is a problem of judging inaccurate, automatic focusing method has structure and answers because needing special setting image acquiring device
Problem that is miscellaneous, being more expensive to manufacture.
The content of the invention
In view of this, it is an object of the invention to provide a kind of focusing method, with it, prior art can be solved
In, the problem of automatic accurate focusing cannot be carried out because projector equipment is not provided with image acquiring device, so as to solve because of needs
It is special image acquiring device to be set and be there is a problem of complex structure, be more expensive to manufacture.
Another object of the present invention is to provide a kind of focusing system, by the system, can solve in the prior art, because
Projector equipment is not provided with image acquiring device and cannot carry out the problem of automatic accurate focusing, so as to solve because needing specially to set
Put image acquiring device and there is a problem of complex structure, be more expensive to manufacture.
To achieve the above object, the embodiment of the present invention is adopted the following technical scheme that：
A kind of focusing method, including：
Projector equipment controls drive device to preset step-length according to first and carries out focus operations successively, and to pre- under each focal length
The mark picture deposited carries out projection process, generates projected picture；
Terminal device is obtained when the corresponding projected picture of front focal length before the drive device carries out focus operations next time,
And calculate the definition of the projected picture；
Definition less than adjacent preceding n times focal length corresponding throwing of the terminal device in the projected picture obtained when front focal length
During the definition of shadow picture, generation stops focusing and instructs and send to the projector equipment；And
The projector equipment stops focus operations according to the focusing instruction control drive device that stops.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, methods described also includes：
Definition less than adjacent preceding n times focal length corresponding throwing of the terminal device in the projected picture obtained when front focal length
During the definition of shadow picture, reversely focusing is instructed and sent to the projector equipment for generation；
The terminal device obtain the projector equipment according to the reverse focusing instruction control drive device along with
Direction in opposite direction of currently focusing carries out the projected picture of reverse focus operations generation successively according to the second default step-length, and counts
The definition of the projected picture is calculated, the described second default step-length is less than the described first default step-length；And
The definition of projected picture of the terminal device in reverse focus operations when front focal length is burnt less than adjacent preceding n times
Away from projected picture definition when, generation stop focusing instructing and send to the projector equipment.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, methods described also includes：
The projector equipment is according to the focusing instruction control drive device that stops along in opposite direction with current focusing
Direction carry out N-1 focus operations according to the second default step-length；And
After the N-1 focus operations are completed, the projector equipment controls the drive device to stop focus operations.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, the projector equipment controls drive device
Also include before the step of carrying out focus operations successively according to the first default step-length：The drive device is by the projector equipment
Focal length is adjusted to maximum focal length or minimum focus.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, in the drive device by the projection
When the focal length of equipment is adjusted to maximum focal length, the projector equipment control drive device is focused successively according to the first default step-length
The step of operation, includes：
The projector equipment controls the drive device according to the first default step-length successively along near the direction of minimum focus
Carry out focus operations；
When the focal length of the projector equipment is adjusted to minimum focus by the drive device, the projector equipment control drives
The step of device carries out focus operations successively according to the first default step-length includes：
The projector equipment controls the drive device according to the first default step-length successively along near the direction of maximum focal length
Carry out focus operations.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, the terminal device is obtained when front focal length
During the definition of the definition of the projected picture for taking projected picture corresponding less than adjacent preceding two posterior focal distance, generation stopping focusing referring to
Make and send to the projector equipment.
It is described to calculate the clear of the projected picture in above-mentioned focusing method in the embodiment of the present invention is preferably selected
The step of spending includes：
The projected picture is converted into gray-scale map, and sampling processing is carried out to the gray-scale map；
The profile information of the gray-scale map that sampling processing is obtained is extracted, the profile information includes multiple shapes differences and area
Different graph outlines；
Filtered out from the different graph outlines different with area of the multiple shape and meet pre-conditioned graph outline；
And
Calculating meets the definition of pre-conditioned graph outline.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing method, it is described from the multiple shape it is different and
Filtering out the step of meeting pre-conditioned graph outline in the different graph outline of area includes：
Areal calculation is carried out to the different graph outlines different with area of the multiple shape, the face of each graph outline is obtained
Product；
Area is carried out into matching degree calculating more than the graph outline of preset area with preset shape, each graph outline is obtained
Matching degree；And
Obtain the graph outline that matching degree meets preset matching degree.
On the basis of the above, the embodiment of the present invention additionally provides a kind of focusing system, and the focusing system sets including projection
Standby and terminal device, the projector equipment is provided with the drive device for carrying out focus operations；
The projector equipment carries out focus operations successively for controlling drive device to preset step-length according to first, and in each Jiao
Projection process is carried out away from the lower mark picture to prestoring, projected picture is generated；
The terminal device is used to be obtained before the drive device carries out focus operations next time when front focal length is corresponding
Projected picture, and calculate the definition of the projected picture；
The terminal device is additionally operable to be less than adjacent preceding n times focal length pair in the definition of the projected picture obtained when front focal length
During the definition of the projected picture answered, generation stops focusing and instructs and send to the projector equipment；
The projector equipment is additionally operable to stop focus operations according to the focusing instruction control drive device that stops.
In the embodiment of the present invention is preferably selected, in above-mentioned focusing system, the terminal device is additionally operable to current
During the definition of the definition of the projected picture that focal length is obtained projected picture corresponding less than adjacent preceding n times focal length, generation is reverse
Focusing is instructed and sent to the projector equipment；
The terminal device is additionally operable to obtain the projector equipment according to the reverse focusing instruction control driving dress
Put edge carries out the shadowgraph of reverse focus operations generation with direction in opposite direction of currently focusing successively according to the second default step-length
Face, and the definition of the projected picture is calculated, the described second default step-length is less than the described first default step-length；
The terminal device is additionally operable in reverse focus operations the definition when the projected picture of front focal length less than adjacent
During the definition of the projected picture of preceding n times focal length, generation stops focusing and instructs and send to the projector equipment.
The present invention provides a kind of focusing method and system, by the mutual cooperation of projector equipment and terminal device, using end
The communication capacity of end equipment, picture acquisition power and disposal ability, can solve in the prior art, because projector equipment is not provided with
Image acquiring device and the problem of automatic focusing cannot be carried out, and then solve projector equipment because cannot automatic focusing cause shadowgraph
Face is unintelligible and cause the problem of poor user experience, and can also solve because specially projector equipment set image acquiring device and
Complex structure and the problem being more expensive to manufacture are caused, with great practical value.
Further, the second default step-length by carrying out reverse focus operations and reversely focus presets step less than first
It is long, it is possible to achieve the different regulation of precision twice, so as to solve because of the throwing that drive device action is inaccurate and terminal device is obtained
There is error and cause focusing inaccurate in shadow picture, considerably improve the practicality of the method.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
Fig. 1 is the structured flowchart of focusing system provided in an embodiment of the present invention.
Fig. 2 is the schematic flow sheet of focusing method provided in an embodiment of the present invention.
Fig. 3 is another schematic flow sheet of focusing method provided in an embodiment of the present invention.
Fig. 4 is another schematic flow sheet of focusing method provided in an embodiment of the present invention.
Icon：10- focusing systems；100- projector equipments；120- drive devices；140- signal receiving devices；200- terminals
Equipment；220- sender units.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment only
It is a part of embodiment of the invention, rather than whole embodiments.The present invention generally described and illustrated in accompanying drawing herein
The component of embodiment can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further defined and explained in subsequent accompanying drawing.In description of the invention
In, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that being or hint relative importance.
As shown in figure 1, the embodiment of the invention provides a kind of focusing system 10, the focusing system 10 includes projector equipment
100 and terminal device 200, the projector equipment 100 is provided with drive device 120.
Alternatively, the concrete form of the projector equipment 100 is unrestricted, as long as the function with image projection and logical
Telecommunication function, such as projecting apparatus.The concrete form of the terminal device 200 is unrestricted, if having picture acquisition power,
Image-capable and communication function, for example, can be that the mobile terminals such as mobile phone, panel computer, portable computer set
It is standby.The concrete form of the drive device 120 is unrestricted, as long as can provide power carries out focus operations, such as motor.
Further, in the present embodiment, the drive device 120 is used to carry out focus operations.The projector equipment 100
For controlling the drive device 120 to carry out focus operations successively according to the first default step-length, and to prestoring under each focal length
Mark picture carries out projection process, generates projected picture.The terminal device 200 is used in the case where the drive device 120 is carried out
Obtained before focus operations and work as the corresponding projected picture of front focal length, and calculate the definition of the projected picture.The terminal sets
Standby 200 are additionally operable to definition in the projected picture obtained when front focal length projected picture corresponding less than adjacent preceding n times focal length
During definition, generation stops focusing and instructs and send to the projector equipment 100.The projector equipment 100 is additionally operable to according to institute
State the stopping focusing instruction control drive device 120 and stop focus operations.
In the present embodiment, it is contemplated that the terminal device 200 and the projector equipment 100 can carry out stopping focusing instruction
Send and receive, the terminal device 200 should also include at least one sender unit that can carry out signal transmission
220, the projector equipment 100 should also include at least one signal receiving device 140 that can carry out signal reception.
Alternatively, the specific communication mode and original between the sender unit 220 and the signal receiving device 140
Reason can be various, the particular type according to the terminal device 200 has different selections, for example can be Wi-Fi, 3G,
Other communications such as 4G, bluetooth.
Further, in the present embodiment, the terminal device 200 is additionally operable in the projected picture obtained when front focal length
During the definition of definition projected picture corresponding less than adjacent preceding n times focal length, reversely focusing is instructed and sent to described for generation
Projector equipment 100.The terminal device 200 is additionally operable to obtain the projector equipment 100 according to the reverse focusing instruction control
The drive device 120 carries out reverse focus operations successively along with direction in opposite direction of currently focusing according to the second default step-length
The projected picture of generation, and the definition of the projected picture is calculated, the described second default step-length is less than the described first default step-length.
The terminal device 200 is additionally operable in reverse focus operations be less than adjacent preceding n times when the definition of the projected picture of front focal length
During the definition of the projected picture of focal length, generation stops focusing and instructs and send to the projector equipment 100.
With reference to Fig. 2, the embodiment of the present invention also provides a kind of focusing method, and methods described is applied to above-mentioned focusing system 10.
The idiographic flow step of the focusing method is described in detail below in conjunction with Fig. 2.
Step S110, projector equipment 100 controls drive device 120 to preset step-length according to first and carries out focus operations successively,
And projection process is carried out to the mark picture for prestoring under each focal length, generate projected picture.
In the present embodiment, the projector equipment 100 carries out multiple focus operations with life by the drive device 120
The different projected picture of definition under into multiple different focals, calculates so that the terminal device 200 obtains line definition of going forward side by side,
So as to realize the purpose of focusing.
The projector equipment 100 is additionally provided with storage device, for storing the mark picture.Alternatively, the mark
The concrete shape of picture is unrestricted, for example, both can be circular, or square, can also be Else Rule or does not advise
Shape then, as long as including identification information in the mark picture.In the present embodiment, the mark picture is circle.
Particular location in the mark picture of the identification information is unrestricted, for example, both can be in the mark picture
Upper end, lower end and middle part.In the present embodiment, the identification information is located at the lower end of the mark picture.
In the present embodiment, it is low from definition to ensure the drive device 120 during focus operations are carried out
It is adjusted successively to definition direction high, therefore, when focus operations are carried out according to the described first default step-length, also need to lead to
Cross the drive device 120 and the focal length of the projector equipment 100 is adjusted to maximum focal length or minimum focus.
Alternatively, according to the difference of the particular location for being adjusted to the focal length of the projector equipment 100, carrying out according to first
There are different selections in specific focusing direction during default step-length focus operations, for example, in the drive device 120 by the projection
When the focal length of equipment 100 is adjusted to maximum focal length, the projector equipment 100 control drive device 120 according to the first default step-length according to
It is secondary to include the step of carry out focus operations：The projector equipment 100 control the drive device 120 according to the first default step-length according to
It is secondary to carry out focus operations along near the direction of minimum focus.The focal length of the projector equipment 100 is adjusted in the drive device 120
During to minimum focus, the projector equipment 100 controls drive device 120 to preset step-length according to first and carries out focus operations successively
Step includes：The projector equipment 100 controls the drive device 120 according to the first default step-length successively along near maximum focal length
Direction carry out focus operations.In the present embodiment, it is not particularly limited, is configured according to practical application request.
Step S120, terminal device 200 is obtained before the drive device 120 carries out focus operations next time works as front focal length
Corresponding projected picture, and calculate the definition of the projected picture.
In the present embodiment, at least one projected picture under each focal length can be obtained to ensure the terminal device 200,
So as to calculate the definition of the projected picture, the terminal device 200 can will work as front focal length before focus operations each time are carried out
Corresponding projected picture carries out shooting treatment.Alternatively, realize that the mode of above-mentioned purpose is unrestricted, both can be the driving
Device 120 is carrying out a focus operations at interval of the first Preset Time, and the terminal device 200 is at interval of the second Preset Time
Once shooting treatment is carried out, and first Preset Time and second Preset Time are arranged in a crossed manner, so that the terminal sets
Standby 200 when projected picture is obtained, and the projector equipment 100 will not carry out focus operations, can also be the terminal device 200
A projected picture is often obtained, then issues a finger for indicating that focus operations next time can be carried out to the projector equipment 100
Order, the projector equipment 100 just carries out focus operations next time only when the instruction is received.
Alternatively, the concrete mode of the definition for calculating the projected picture is unrestricted, in the present embodiment can be with
Comprise the following steps：The projected picture is converted into gray-scale map, and sampling processing is carried out to the gray-scale map；Extract at sampling
The profile information of the gray-scale map that reason is obtained, the profile information includes the different graph outlines different with area of multiple shapes；From
Filtered out in the different graph outlines different with area of the multiple shape and meet pre-conditioned graph outline；Calculate and meet pre-
If the definition of the graph outline of condition.
In the present embodiment, the form of the projected picture that the terminal device 200 is obtained is generally the image of rgb format,
Sharpness computation is carried out in view of the image being difficult to according to prior art directly to rgb format, it is therefore desirable to by the shadowgraph
Face is converted to gray-scale map.
Alternatively, the concrete mode of the sampling processing is unrestricted, can be with as long as meeting information that sampling processing obtains
Reflect the information characteristic before sampling processing.In the present embodiment, the concrete principle of the sampling processing is Gauss sampling,
And it is the sample graph of the half of the figure before sampling processing to obtain a scale size by Gauss sampling.
Alternatively, the concrete mode of the profile information for extracting the gray-scale map that sampling processing is obtained is unrestricted.At this
In embodiment, CANNY edge detection process is carried out by the sample graph, obtain a CANNY edge graph, the CANNY
Edge graph includes the different graph outlines different with area of multiple shapes, and the CANNY edge graphs are the profile information.
Alternatively, filtered out in the different graph outlines different with area from the multiple shape and meet pre-conditioned
Graph outline concrete mode it is unrestricted, may comprise steps of in the present embodiment：It is different to the multiple shape
The graph outline different with area carries out areal calculation, obtains the area of each graph outline；Figure by area more than preset area
Shape profile carries out matching degree calculating with preset shape, obtains the matching degree of each graph outline；Obtain matching degree and meet preset matching
The graph outline of degree.
Alternatively, the size of the preset area is unrestricted, and concrete condition can be according to the mark in the mark picture
The specific required precision of knowledge information and focus operations is designed.
Alternatively, the concrete mode for obtaining the graph outline that matching degree meets preset matching degree is unrestricted, specifically
Situation can be configured according to the preset shape.In the present embodiment, the mark picture is circle, and the preset shape is
Circle, thus meet preset matching degree graph outline should have certain circular pattern feature, for example can be described
The Aspect Ratio of graph outline should be less than 1.2, and the marginal point of the graph outline should be less than to the variance of the distance of central point
4.0。
Step S130, the terminal device 200 is less than adjacent preceding n times in the definition of the projected picture obtained when front focal length
During the definition of the corresponding projected picture of focal length, generation stops focusing and instructs and send to the projector equipment 100.
In the present embodiment, after the terminal device 200 carries out the calculating of definition each time, can be by the projected picture
Definition preserved, and the projected picture that the definition of current projected picture is obtained with adjacent preceding n times definition
It is compared, and in the definition of the definition projected picture corresponding less than adjacent preceding n times focal length of current projected picture,
Generation stops focusing and instructs and send to the projector equipment 100, so that the projector equipment 100 is stopped operation.By ought
The projected picture that preceding projected picture is obtained with preceding n times enters the comparing of line definition, can know the definition of photo current and be
It is no to be in the decline stage, so as to judge a scope of the best sharpness of projected picture.
Alternatively, the concrete numerical value of above-mentioned N is unrestricted, for example, can be the natural numbers such as 1,2,3.In view of technical scheme
Terseness, drive device 120 in focussing process it is possible that error and two neighboring focal length under projected picture
Definition difference is smaller and be difficult to the problem that size compares, in the present embodiment, the value of above-mentioned N is 2, i.e., described terminal sets
Standby 200 the definition projected picture corresponding less than adjacent preceding two posterior focal distance of the projected picture obtained when front focal length definition
When, generation stops focusing and instructs and send to the projector equipment 100.
Step S140, the projector equipment 100 stops adjusting according to the focusing instruction control drive device 120 that stops
Jiao's operation.
In the present embodiment, the projector equipment 100 controls described driving to fill when the stopping focusing instruction is received
120 stopping focus operations being put, can be using current focal length as the optimal focal length of projected picture definition, so that it is right to complete this
Jiao, so that the projector equipment 100 can be normally carried out projection and use.
With reference to Fig. 3, to ensure to carry out the projected picture of focus operation generation with higher clear by the focusing method
Clear degree, in the present embodiment, the focusing method can also include step S150, step S160 and step S170.
Step S150, the terminal device 200 is less than adjacent preceding n times in the definition of the projected picture obtained when front focal length
During the definition of the corresponding projected picture of focal length, reversely focusing is instructed and sent to the projector equipment 100 for generation.
Precision in view of the drive device 120 is smaller, and larger mistake is likely to occur when focus operations are carried out each time
Difference, so as to influence to judge whether to have reached the corresponding focal length of best sharpness, in the present embodiment, the terminal device 200
Reversely focusing instruction can be also generated after the focus operations for completing first time to control the projector equipment 100 to carry out secondary focusing
Operation.
Step S160, the terminal device 200 obtains the projector equipment 100 according to the reverse focusing instruction control institute
State drive device 120 carries out reverse focus operations life successively along with direction in opposite direction of currently focusing according to the second default step-length
Into projected picture, and calculate the definition of the projected picture.
Because the size of the step-length focused each time is relevant with the precision of focus operations, i.e. the bigger precision of step-length is smaller,
When reversely being focused, the drive device 120 will carry out focus operations, and the described second default step according to the second default step-length
Length should be less than the described first default step-length, so as to improve the precision of reversely focusing.Alternatively, the described second default step-length with it is described
The first specific proportionate relationship of default step-length is unrestricted, as long as less than the described first default step-length.In the present embodiment, tie
The precision of the drive device 120 is closed, the described second default step-length is equal to the half of the described first default step-length.
Step S170, the definition of projected picture of the terminal device 200 in reverse focus operations when front focal length is small
When the definition of the projected picture of adjacent preceding n times focal length, generation stops focusing and instructs and send to the projector equipment 100.
In the present embodiment, the stop condition of reverse focus operations is identical with the stop condition of the first focus operations, i.e. institute
Terminal device 200 is stated in reverse focus operations when the definition of the projected picture of front focal length is less than the throwing of adjacent preceding n times focal length
During the definition of shadow picture, generation stops focusing and instructs and send to the projector equipment 100.
It is appreciated that can also be carried out on the basis of above-mentioned reverse focus operations multiple in opposite direction with current focusing square
To third time, the 4th time and more focus operations, concrete condition can according in practical application to the tool of definition
Body requirement is configured.
It is the definition for further improving the projected picture generated by the focusing method, in the present embodiment with reference to Fig. 4
In, the focusing method can also include step S180 and step S190.
Step S180, the projector equipment 100 according to it is described stop the focusing instruction control drive device 120 along with work as
Preceding focusing direction in opposite direction carries out N-1 focus operations according to the second default step-length.
In theory, when the projector equipment 100 receives the stopping focusing instruction, when the corresponding shadowgraph of front focal length
The definition in face is not best sharpness, and should be with when the adjacent corresponding projected picture of preceding n times focal length of front focal length
Definition, therefore, to make the definition of the projected picture optimal, should control the drive device 120 along with current focusing side
In the opposite direction n times focus operations are carried out according to the second default step-length.It is considered that what the drive device 120 was focused
Step-length is not equal to the described second default step-length, error can occurs in a smaller range, therefore, in the present embodiment
In, the projector equipment 100 is according to the focusing instruction control drive device 120 that stops along in opposite direction with current focusing
Direction carry out N-1 focus operations according to the second default step-length.
Step S190, after the N-1 focus operations are completed, the projector equipment 100 controls the drive device 120
Stop focus operations.
By above-mentioned design, the focal length of the projector equipment 100 can be adjusted to projected picture definition most preferably corresponding
Focal position, so as to realize automatic exact focus, efficiently inter-related task is completed in order to user using projector equipment 100.
In sum, the present invention is provided a kind of focusing method and system, by projector equipment 100 and terminal device 200
Mutual cooperation, using the communication capacity of terminal device 200, picture acquisition power and disposal ability, prior art can be solved
In, the problem of automatic focusing cannot be carried out because projector equipment 100 is not provided with image acquiring device, and then solve projector equipment
100 because cannot automatic focusing cause projected picture unintelligible and caused by poor user experience problem, and can also solve because special
Image acquiring device is set in projector equipment 100 and complex structure and the problem being more expensive to manufacture is caused, with great practicality
Value.Secondly, the second default step-length by carrying out reverse focus operations and reversely focus is less than the first default step-length, Ke Yishi
The now different regulation of precision twice, so as to solve to act the shadowgraph that inaccurate and terminal device 200 is obtained because of drive device 120
There is error and cause focusing inaccurate in face, considerably improve the practicality of the method.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of focusing method, it is characterised in that methods described includes：
Projector equipment controls the drive device to carry out focus operations successively according to the first default step-length, and to prestoring under each focal length
Mark picture carries out projection process, generates projected picture；
Terminal device is obtained when the corresponding projected picture of front focal length before the drive device carries out focus operations next time, and is counted
Calculate the definition of the projected picture；
Definition less than adjacent preceding n times focal length corresponding shadowgraph of the terminal device in the projected picture obtained when front focal length
During the definition in face, generation stops focusing and instructs and send to the projector equipment；And
The projector equipment stops focus operations according to the focusing instruction control drive device that stops.
2. focusing method according to claim 1, it is characterised in that methods described also includes：
Definition less than adjacent preceding n times focal length corresponding shadowgraph of the terminal device in the projected picture obtained when front focal length
During the definition in face, reversely focusing is instructed and sent to the projector equipment for generation；
The terminal device obtain the projector equipment according to the reverse focusing instruction control drive device along with it is current
Focusing direction in opposite direction carries out the projected picture of reverse focus operations generation according to the second default step-length successively, and calculating should
The definition of projected picture, the described second default step-length is less than the described first default step-length；And
The definition of projected picture of the terminal device in reverse focus operations when front focal length is less than adjacent preceding n times focal length
During the definition of projected picture, generation stops focusing and instructs and send to the projector equipment.
3. focusing method according to claim 2, it is characterised in that methods described also includes：
The projector equipment stops the focusing instruction control drive device edge and the side in opposite direction that currently focuses according to described
N-1 focus operations are carried out to according to the second default step-length；And
After the N-1 focus operations are completed, the projector equipment controls the drive device to stop focus operations.
4. focusing method according to claim 1, it is characterised in that the projector equipment controls drive device according to first
Also include before the step of default step-length carries out focus operations successively：
The focal length of the projector equipment is adjusted to maximum focal length or minimum focus by the drive device.
5. focusing method according to claim 4, it is characterised in that in the drive device by Jiao of the projector equipment
Away from when being adjusted to maximum focal length, the projector equipment control drive device carries out the step of focus operations according to the first default step-length successively
Suddenly include：
The projector equipment controls the drive device to preset step-length according to first to be carried out along near the direction of minimum focus successively
Focus operations；
When the focal length of the projector equipment is adjusted to minimum focus by the drive device, the projector equipment controls drive device
The step of carrying out focus operations successively according to the first default step-length includes：
The projector equipment controls the drive device to preset step-length according to first to be carried out along near the direction of maximum focal length successively
Focus operations.
6. focusing method according to claim 1, it is characterised in that the terminal device is in the projection obtained when front focal length
During the definition of the definition of picture projected picture corresponding less than adjacent preceding two posterior focal distance, generation stopping focusing being instructed and sent
To the projector equipment.
7. focusing method according to claim 1, it is characterised in that the step of the definition of the calculating projected picture
Including：
The projected picture is converted into gray-scale map, and sampling processing is carried out to the gray-scale map；
The profile information of the gray-scale map that sampling processing is obtained is extracted, the profile information includes that multiple shapes are different different with area
Graph outline；
Filtered out from the different graph outlines different with area of the multiple shape and meet pre-conditioned graph outline；And
Calculating meets the definition of pre-conditioned graph outline.
8. focusing method according to claim 7, it is characterised in that described different different with area from the multiple shape
Graph outline in filter out the step of meeting pre-conditioned graph outline and include：
Areal calculation is carried out to the different graph outlines different with area of the multiple shape, the area of each graph outline is obtained；
Area is carried out into matching degree calculating more than the graph outline of preset area with preset shape, the matching of each graph outline is obtained
Degree；And
Obtain the graph outline that matching degree meets preset matching degree.
9. a kind of focusing system, it is characterised in that the focusing system includes projector equipment and terminal device, the projector equipment
It is provided with the drive device for carrying out focus operations；
The projector equipment carries out focus operations successively for controlling drive device to preset step-length according to first, and under each focal length
Mark picture to prestoring carries out projection process, generates projected picture；
The terminal device is used to be obtained before the drive device carries out focus operations next time works as the corresponding projection of front focal length
Picture, and calculate the definition of the projected picture；
The terminal device is additionally operable to corresponding less than adjacent preceding n times focal length in the definition of the projected picture obtained when front focal length
During the definition of projected picture, generation stops focusing and instructs and send to the projector equipment；
The projector equipment is additionally operable to stop focus operations according to the focusing instruction control drive device that stops.
10. focusing system according to claim 9, it is characterised in that the terminal device is additionally operable to when front focal length is obtained
During the definition of the definition of the projected picture for taking projected picture corresponding less than adjacent preceding n times focal length, reversely focusing refers to for generation
Make and send to the projector equipment；
The terminal device is additionally operable to obtain the projector equipment according to the reverse focusing instruction control drive device edge
Preset step-length according to second with direction in opposite direction of currently focusing carries out the projected picture of reverse focus operations generation successively, and
The definition of the projected picture is calculated, the described second default step-length is less than the described first default step-length；
The terminal device is additionally operable in reverse focus operations be less than adjacent preceding n times when the definition of the projected picture of front focal length
During the definition of the projected picture of focal length, generation stops focusing and instructs and send to the projector equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710115965.9A CN106899838A (en) | 2017-03-01 | 2017-03-01 | A kind of focusing method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710115965.9A CN106899838A (en) | 2017-03-01 | 2017-03-01 | A kind of focusing method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106899838A true CN106899838A (en) | 2017-06-27 |
Family
ID=59185689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710115965.9A Pending CN106899838A (en) | 2017-03-01 | 2017-03-01 | A kind of focusing method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106899838A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168001A (en) * | 2017-07-20 | 2017-09-15 | 京东方科技集团股份有限公司 | Curtain, optical projection system and focus adjustment method |
| CN107277477A (en) * | 2017-08-16 | 2017-10-20 | 成都市极米科技有限公司 | Gap compensation method, blank compensation apparatus and projector equipment |
| CN107682681A (en) * | 2017-09-29 | 2018-02-09 | 微鲸科技有限公司 | Atomatic focusing method, device and projector equipment |
| CN109005393A (en) * | 2018-08-01 | 2018-12-14 | 苏州佳世达光电有限公司 | A kind of Atomatic focusing method and its system |
| CN109361865A (en) * | 2018-11-21 | 2019-02-19 | 维沃移动通信（杭州）有限公司 | A kind of image pickup method and terminal |
| CN109714519A (en) * | 2017-10-25 | 2019-05-03 | 成都市极米科技有限公司 | A kind of method and system of adjust automatically image frame |
| CN109756715A (en) * | 2019-01-04 | 2019-05-14 | 新视家科技(北京)有限公司 | A kind of method, apparatus, electronic equipment and the terminal of laser television focusing |
| CN110161792A (en) * | 2018-02-11 | 2019-08-23 | 阿里巴巴集团控股有限公司 | Focusing parameter method of adjustment, Atomatic focusing method, device and electronic equipment |
| CN110769220A (en) * | 2018-11-08 | 2020-02-07 | 成都极米科技股份有限公司 | Focusing method and focusing device of projection equipment |
| CN110769230A (en) * | 2019-08-02 | 2020-02-07 | 成都极米科技股份有限公司 | Focusing method and device and projection equipment |
| CN110855967A (en) * | 2019-11-05 | 2020-02-28 | 广景视睿科技（深圳）有限公司 | Focusing assembly control method and device, focusing assembly and projector |
| CN111665638A (en) * | 2020-07-16 | 2020-09-15 | 歌尔光学科技有限公司 | Focusing method of head-mounted device, head-mounted device and computer-readable storage medium |
| WO2021017476A1 (en) * | 2019-08-01 | 2021-02-04 | 成都极米科技股份有限公司 | Focus method employing auxiliary tool, auxiliary tool, and projection system |
| CN112799275A (en) * | 2019-11-13 | 2021-05-14 | 青岛海信激光显示股份有限公司 | Focusing method and focusing system of ultra-short-focus projection lens and projector |
| CN114422660A (en) * | 2021-12-06 | 2022-04-29 | 江苏航天大为科技股份有限公司 | Imaging focusing system of designated monitoring area |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090268172A1 (en) * | 2008-04-28 | 2009-10-29 | Hon Hai Precision Industry Co., Ltd. | Projector with autofocus device |
| CN201926858U (en) * | 2010-12-31 | 2011-08-10 | 深圳展景世纪科技有限公司 | Projector |
| CN102385235A (en) * | 2010-08-25 | 2012-03-21 | 亚洲光学股份有限公司 | Projection device with automatic focusing function and automatic focusing method thereof |
| CN102967991A (en) * | 2012-11-08 | 2013-03-13 | 广东欧珀移动通信有限公司 | Method, device, system and mobile terminal for adjusting projector focal length |
| JP2013156318A (en) * | 2012-01-27 | 2013-08-15 | Casio Comput Co Ltd | Projector and projection control method |
| CN106231201A (en) * | 2016-08-31 | 2016-12-14 | 成都市极米科技有限公司 | Atomatic focusing method and device |
-
2017
- 2017-03-01 CN CN201710115965.9A patent/CN106899838A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090268172A1 (en) * | 2008-04-28 | 2009-10-29 | Hon Hai Precision Industry Co., Ltd. | Projector with autofocus device |
| CN102385235A (en) * | 2010-08-25 | 2012-03-21 | 亚洲光学股份有限公司 | Projection device with automatic focusing function and automatic focusing method thereof |
| CN201926858U (en) * | 2010-12-31 | 2011-08-10 | 深圳展景世纪科技有限公司 | Projector |
| JP2013156318A (en) * | 2012-01-27 | 2013-08-15 | Casio Comput Co Ltd | Projector and projection control method |
| CN102967991A (en) * | 2012-11-08 | 2013-03-13 | 广东欧珀移动通信有限公司 | Method, device, system and mobile terminal for adjusting projector focal length |
| CN106231201A (en) * | 2016-08-31 | 2016-12-14 | 成都市极米科技有限公司 | Atomatic focusing method and device |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168001A (en) * | 2017-07-20 | 2017-09-15 | 京东方科技集团股份有限公司 | Curtain, optical projection system and focus adjustment method |
| CN107168001B (en) * | 2017-07-20 | 2019-11-19 | 京东方科技集团股份有限公司 | Curtain, optical projection system and focus adjustment method |
| CN107277477A (en) * | 2017-08-16 | 2017-10-20 | 成都市极米科技有限公司 | Gap compensation method, blank compensation apparatus and projector equipment |
| CN107682681A (en) * | 2017-09-29 | 2018-02-09 | 微鲸科技有限公司 | Atomatic focusing method, device and projector equipment |
| CN109714519A (en) * | 2017-10-25 | 2019-05-03 | 成都市极米科技有限公司 | A kind of method and system of adjust automatically image frame |
| CN110161792A (en) * | 2018-02-11 | 2019-08-23 | 阿里巴巴集团控股有限公司 | Focusing parameter method of adjustment, Atomatic focusing method, device and electronic equipment |
| CN110161792B (en) * | 2018-02-11 | 2022-02-01 | 阿里巴巴集团控股有限公司 | Focusing parameter adjusting method, automatic focusing method and device and electronic equipment |
| CN109005393B (en) * | 2018-08-01 | 2021-02-19 | 苏州佳世达光电有限公司 | Automatic focusing method and system thereof |
| CN109005393A (en) * | 2018-08-01 | 2018-12-14 | 苏州佳世达光电有限公司 | A kind of Atomatic focusing method and its system |
| CN110769220A (en) * | 2018-11-08 | 2020-02-07 | 成都极米科技股份有限公司 | Focusing method and focusing device of projection equipment |
| CN110769220B (en) * | 2018-11-08 | 2021-12-14 | 成都极米科技股份有限公司 | Focusing method and focusing device of projection equipment |
| CN109361865B (en) * | 2018-11-21 | 2020-08-04 | 维沃移动通信（杭州）有限公司 | Shooting method and terminal |
| CN109361865A (en) * | 2018-11-21 | 2019-02-19 | 维沃移动通信（杭州）有限公司 | A kind of image pickup method and terminal |
| CN109756715A (en) * | 2019-01-04 | 2019-05-14 | 新视家科技(北京)有限公司 | A kind of method, apparatus, electronic equipment and the terminal of laser television focusing |
| WO2021017476A1 (en) * | 2019-08-01 | 2021-02-04 | 成都极米科技股份有限公司 | Focus method employing auxiliary tool, auxiliary tool, and projection system |
| CN110769230A (en) * | 2019-08-02 | 2020-02-07 | 成都极米科技股份有限公司 | Focusing method and device and projection equipment |
| CN110855967A (en) * | 2019-11-05 | 2020-02-28 | 广景视睿科技（深圳）有限公司 | Focusing assembly control method and device, focusing assembly and projector |
| CN112799275A (en) * | 2019-11-13 | 2021-05-14 | 青岛海信激光显示股份有限公司 | Focusing method and focusing system of ultra-short-focus projection lens and projector |
| CN112799275B (en) * | 2019-11-13 | 2023-01-06 | 青岛海信激光显示股份有限公司 | Focusing method and focusing system of ultra-short-focus projection lens and projector |
| CN111665638A (en) * | 2020-07-16 | 2020-09-15 | 歌尔光学科技有限公司 | Focusing method of head-mounted device, head-mounted device and computer-readable storage medium |
| CN111665638B (en) * | 2020-07-16 | 2022-03-25 | 歌尔光学科技有限公司 | Focusing method of head-mounted device, head-mounted device and computer-readable storage medium |
| CN114422660A (en) * | 2021-12-06 | 2022-04-29 | 江苏航天大为科技股份有限公司 | Imaging focusing system of designated monitoring area |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106899838A (en) | A kind of focusing method and system | |
| CN106201170B (en) | A kind of the footmark processing method and terminal of application icon | |
| CN100430997C (en) | Adjustable display of mobile communications terminal | |
| CN106954053A (en) | A kind of trapezoidal distortion correction method and system | |
| CN105488511A (en) | Image identification method and device | |
| CN104143078A (en) | Living body face recognition method and device and equipment | |
| CN104050645B (en) | Image processing method and device | |
| CN110757555B (en) | Control method and device for cutting PCB (printed Circuit Board) by board separator | |
| CN103428007B (en) | A kind of method and device setting up communication group | |
| CN103996186A (en) | Image cutting method and image cutting device | |
| CN205234447U (en) | Automatic optometry top of head dioptric strength governing system | |
| CN108346175A (en) | A kind of facial image restorative procedure, device and storage medium | |
| CN112036345A (en) | Method for detecting number of people in target place, recommendation method, detection system and medium | |
| CN105872246A (en) | Anti-addiction method, anti-addiction device and terminal | |
| CN106775332A (en) | Image processing method and picture processing system | |
| CN105117706A (en) | Image processing method and apparatus and character recognition method and apparatus | |
| CN106557759A (en) | A kind of sign board information getting method and device | |
| CN105931239A (en) | Image processing method and device | |
| CN104252828A (en) | Vision-protective display method, vision-protective display device and terminal equipment | |
| CN106814959A (en) | A kind of U.S. face photographic method, device and terminal | |
| CN104637047B (en) | A kind of image processing method and device | |
| CN104915053B (en) | The location determining method and device of a kind of interface control | |
| CN106067167A (en) | Image processing method and device | |
| EP3327896A1 (en) | Power supply control method and apparatus of power strip, computer program and recording medium | |
| CN106909930A (en) | A kind of model and method of the man-machine automatic switchover based on government affairs machine question answering system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |